asp.net中DataTable和List之間相互轉換

在asp.net開發中常會遇到這樣的問題，這裡跟大家分享一個其之間相互轉換的方法：

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Reflection;
using System.Web;

namespace ContourWebs.BaseClass
{
    public class DTList
    {
        /// <summary>
        /// DataTable轉換成List<T>
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="table"></param>
        /// <returns></returns>
        public static List<T> GetList<T>(DataTable table)
        {
            List<T> list = new List<T>();
            T t = default(T);
            PropertyInfo[] propertypes = null;
            string tempName = string.Empty;
            foreach (DataRow row in table.Rows)
            {
                t = Activator.CreateInstance<T>();
                propertypes = t.GetType().GetProperties();
                foreach (PropertyInfo pro in propertypes)
                {
                    tempName = pro.Name;
                    if (table.Columns.Contains(tempName))
                    {
                        object value = row[tempName];
                        if (!value.ToString().Equals(""))
                        {
                            pro.SetValue(t, value, null);
                        }
                    }
                }
                list.Add(t);
            }
            return list.Count == 0 ? null : list;
        }

        /// <summary>
        /// List<T>轉換成DataTable
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="list"></param>
        /// <returns></returns>
        public static DataSet ConvertToDataSet<T>(IList<T> list)
        {
            if (list == null || list.Count <= 0)
            {
                return null;
            }

            DataSet ds = new DataSet();
            DataTable dt = new DataTable(typeof(T).Name);
            DataColumn column;
            DataRow row;

            System.Reflection.PropertyInfo[] myPropertyInfo = typeof(T).GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance);

            foreach (T t in list)
            {
                if (t == null)
                {
                    continue;
                }

                row = dt.NewRow();

                for (int i = 0, j = myPropertyInfo.Length; i < j; i++)
                {
                    System.Reflection.PropertyInfo pi = myPropertyInfo[i];

                    string name = pi.Name;

                    if (dt.Columns[name] == null)
                    {
                        column = new DataColumn(name, pi.PropertyType);
                        dt.Columns.Add(column);
                    }

                    row[name] = pi.GetValue(t, null);
                }

                dt.Rows.Add(row);
            }

            ds.Tables.Add(dt);

            return ds;
        }
    }
}